212-- 20 first graders and six staff members were killed at sandy hook elementary school in newtown, connecticut. >> the question then becomes, you know, whether we are actually shook up enough by what happened here. that it does not just become another one of these routine episodes. where it gets a lot of attention for a couple of weeks and drifts away. it certainly won't feel like that to me. this is something that that was the fertion worst day of my presidency, an it's not something i want to see repeated. >> in california for nearly 20 years a person convicted of breaking three law, no matter how minor would be sent to prison for life. no exceptions. john blackstone tonight reports on the young people who saw injustice in the three strikes law and set out to change it. >> reporter: at standford law school michael romano and his students don't just study justice, they go in search of it. seeking to free those who because of california's three strikes law are serving life sentences for minor crimes. >> his third strike was shoplifting a pair of gloves and a spool of wire from home depot. >> t